Dryers can be direct, indirect, or radiant-heat and continuous or batch wise. In the drying experiment that will be conducted in this laboratory, a direct adiabatic batch dryer is used to remove water from the desiccant. A comparison of kitty litter and some other desiccant will be conducted and optimal drying conditions for each will be determined. Hot air will be used as the regeneration medium. .
IV. Experimental Design.
Preliminary Analysis of Problem.
The purpose of this laboratory experiment is to determine which of two available desiccants is more quickly and efficiently regenerated. The optimum conditions of regeneration will also be found. Once these conditions are determined, the better desiccant will be used to model a scale-up in which 12 tons/day of desiccant will be dried on a continuous belt dryer that is 4 feet wide and 50 feet long. .
In order to analyze this procedure, the theory of solid drying must be understood. Solid drying involves two underlying processes:.
1. Heat transfer: As heat is introduced to the system, water at the surface will begin to evaporate. The temperature difference between the hot air and the saturated desiccant provides the driving force for this evaporation to occur. The relevant equation for heat transfer by convection is Fourier's Law:.
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2. Mass transfer: The liquid within the desiccant will diffuse to the surface from where it will diffuse into the hot air as a vapor. The relevant equation for mass transfer is Fick's Law:.
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The rate of drying is determined by the different influences that direct these two basic processes. These influences can be divided into internal flow mechanisms within the adsorbent and the external conditions of the hot air. The internal flow mechanisms include diffusion, capillary flow, pressure gradients, and vaporization-condensation sequences. Although an understanding of these mechanisms is important, the more relevant influences are those of the external conditions of the hot air.
They brought in a new grain dryer for a station. ... Seven years later, the grain dryer malfunctioned, causing a fire. The University of Michigan sued the dryer maker for damages in tort for product liability. The dryer maker defended that UM is a merchant under the UCC so therefore could not sue in tort. ... In 1985, the University purchased a gas fired blower dryer unit, manufactured by Chief. ...
The reason for this is that the washer machine always finishes before the dryer. ... Sometimes the load in the dryer is not fully dry. ... When the towels in the dryer are finished, I would take them out and put them in the dryer. ... When they are done washing, I check the dryer to see how much the towels have dried. ... Then I start the dryer up, and go to bed. ...
Now that the wash cycle is complete, remove the clothes from the washing machine and put them into the dryer and if you wish, you can also throw in an anti-static sheet with the load. Then be sure to remove lint from the lint tray usually located on the top of the dryer. ... After setting the timer all you have to do now is shut the dryer door and turn it on. Once your clothes are completely dry, remove them from the dryer and fold them and you're all set. ...
I feel that in order to stop laundry theft on college campuses, students should be required to bring a lock to put on in-use washers and dryers. ... In order to make washers and dryers safer for students laundry, each BGSU student should be required to purchase a universal lock to put on the washer or dryer that they are using. ... Each washer and dryer would have two small pieces of metal welded to it, one on the machine itself and one on its' door. ... The only costs would be to install lock mechanisms onto the washers and dryers, and purchasing the locks that all students would then re...
Possible Causes On May 4th, 1988 workers were doing welding work on the buildings steel reinforced fiberglass paneling, on the batch dryer house (see appendix A). ... It is also thought that the fire could have been caused by electrical faults, overheated motors, or the batch dryer itself. The batch dryer motor was repaired early that morning, making it a possible candidate for the cause of the fire. ... Making the situation worse, was the AP residue all over the batch dryer house. ... Immediately after this explosion, there was a second explosion in the dryer building, and a third in the chl...
A washer/ dryer product already exists on the market but has failed to achieve notoriety. ... These include those who do not own either a washer, dryer or both. ... The propensity to purchase in this category is affected by the length of the product life cycles of the existing washers and dryers in the market. ... Principal Competition/Competitive offers The WashDry will be positioned in the market against Laundromats as well as washers and dryers currently sold in the market place. ... A comparative approach should be used that shows the benefits of this new machine over the Washing Machin...
Then, make sure that the lint filter in the dryer is empty. ... Then unload the wet clothing from the washer into the dryer. Next, place a fabric softener sheet into the dryer, close the door, and deposit the quarters into the machine. ...
(color) 3 DVD players 0 DVD players 4 VCR's 0 VCR's 2 computers 0 computers 3 stereo's 1 stereo's 1 microwave 0 microwave 1 stove/oven 1 stove/oven 1 toaster 1 toaster 1 coffee maker 1 coffee maker 1 dish washer 1 dish washer 1 washer machine 1 washer machine 1 dryer 1 dryer 4 electric clocks 2 electric clocks 4 phones 2 phones 4 cell phones 0 cell phones 1 paper shredder 0 paper shredder 1 copy machine 0 copy machine The reason our energy use increased so greatly...
In the September 5th issue of Rolling Stone there are two advertisements that display very attractive people gazing and posing to the viewer. In advertising, we are bombarded by images that have become standard in defining beauty and what is acceptable, and we often don't realize it. In both of th...